...1 超声标志在孕早期的应用 Bindra等［9］发现，在妊娠11～13+6周，大部分染色体异常胎儿的颈项透明层厚度（nuchal translucency,NT）增加。
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孕11 - 13 + 6周胎儿颈项透明层(NT)厚度已经成为早孕期筛查唐氏综合征的重要指标。
In 11-13 + 6 weeks, fetal nuchal translucency (nt) thickness has become an important index of down's syndrome of early pregnancy screening.
妊娠中期超声检查的软性标记物：我们能从早期妊娠胎儿颈项透明层厚度筛查经验中学到什么?。
Second-trimester sonographic soft markers: what can we learn from the experience of first-trimester nuchal translucency screening?
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